Metallic frame construction.



PATENTBD SEPT. 5, 1905.

J. A. LUNDSTEDT. METALLIC FRAME CONSTRUCTION.

APPLICATION FILED AUG. 16, 1904.

ATTORNEY JOHN A. LUNDSTEDT, OF NEXV YORK, N. Y.

METALLIC FRAME CONSTRUCTION- Specification of Letters Patent.

Patented Sept. 5, 1905.

Application filed August 16, 1904;. Serial No. 220,889.

Be it known that l, J ou'N A. LUNns'rnD'r, a subject of the King of Sweden and Norway, and a resident of New York city, county and State of New York, have invented certain new and useful Improvements in Metallic Frame Constructions, of which the following is a specification.

My invention relates to means of connecting intermediate beams to the main beams or girders in metallic frame construction, and has for its object to economize in the handling of the intermediate beams.

It consists of a clamp applicable to the ends of the said intermediate beams for bolting or riveting said intermediate beams to the main beams, the said clamp being so applicable without in any way perforating the intermediate beams, thus saving the handling of said intermediate beams for perforating them, as hereinafter described, reference being made to the accompanying drawings, in whiclr- Figure 1 is a perspective view of a piece of metallic frame construction, showing the end of an intermediate beam connected to a main beam in accordance with my invention. Fig. 2 is a side elevation of part of the main beam and vertical transverse section of the intermediate beam, further illustrating the invention. Fig. 3 is a perspective view showing a modification of the invention. Fig. i is a side elevation of the main beam and transverse section of the intermediate beam in further illustration of said modification.

A represents a main beam or girder, and B an intermediate beam, such as are arranged at right angles to the main beam and secured to them at the ends for supporting floors and the like, and are commonly secured by angleplates riveted or bolted to the webs of the two beams, respectively, which necessitates the handling of both for perforating the webs for the rivets or bolts by which the angleplates are secured. By my invention .I avoid the handling of the intermediate beams for perforating them by the use of myimproved clamp, which connects the angle-plates or other equivalent device to the intermediate beams without bolting or riveting through the web as follows: I take a suitable piece of flat plate of proper strength and bend it at the middle, so as to form a yoke-head r/, enwrapping the upper tlange-head of the beam B, so as to grip the under sides of the said head at r, and extend along the sides of web (Z to the upper side of the lower flange 0 and bear thereon at without touching said web (l, with terminals 1/ extending below head 24, to be bolted together under said head by a bolt /1, whereby said clamp naturally having a little open set as it comes from the machine in which it is made, as indicated by the dotted lines in Figs. 2 and 4, slips on the end of the beam easily and through the action of the bolt 71 grips at the bearing-points of, with slight buckling of the intermediate webs insuring elastic and constant grip on said points of. This yoke may have angle-flanges j for bolting or riveting on the web itof the main beam, same as the ordinary connecting angle-plates, or it may have a T-head I to rest on and be bolted to the head-flange w of the main beam. It will be seen that although the clamp has to be perforated as well there is still a large economy in handling, because the beams, which weigh many times the weight of the clamps, may now be shipped directly from the rolling-mill in which they are made to the place of erection, while only the clamps go to the perforating-mill or structural shop for perforation.

lVhat I claim as my invention is- 1. In metallic frame construction, the combination with the intermediate beams and main beams, of the part or parts to be riveted or bolted to the main beam, secured to the intermediate beam by pressed steel springy and contractile yoke-clamps, enwrapping the ends of the intermediate beams and having a part or parts bolted or riveted to the main beam, the jaws of said clamps being bolted together without perforating the intermediate beams.

2. In metallic frame construction, the combination with the intermediate beams and main beams, of the part or parts to be riveted or bolted to the main beams, secured to the intermediate beams by yoke-clamps enwrapping the top and sides of the intermediate beams. and having bearing-points on the inner faces of the flanges of said intermediate beams, with clearance between the webs of the clamps and beams, and also having extension parts bolted together under said intermediate beams to confine the clamps on them.

Signed at New York this 1st day of August, 1904.

JOl IN A. LUNDSTEDT. \Vitnesses:

J. M. l-Imvauo, C. Sunowron. 

